Why does the car shake when driving at high speed?

[JulietRose]

Car shaking at high speed is a common phenomenon. The following are the reasons why a car shakes at high speed: 1. The brake disc surface is uneven, and the radial runout is too large. When braking, the contact between the brake pads and the brake disc varies in tightness, causing the braking force to fluctuate, which results in body vibration. This is usually noticeable when lightly applying the brakes. 2. Large deviation in wheel alignment data. Especially when the front wheel alignment angle is incorrect and the toe-in is too large. In this case, the vehicle feels difficult to control during acceleration, and the shaking is generally not severe, but it feels awkward to drive. 3. Tire pressure is too high or too low. The higher the tire pressure, the more severe the body vibration at high speeds. If the tire pressure is too low, the body will feel unstable and may pull to one side. 4. Abnormal tire wear. Due to wheel misalignment or rim deformation, the tire surface wears unevenly, causing body vibration while driving. 5. Rim deformation. When the tire is mounted on the rim, deformation of the rim will cause the tire to deform as well, resulting in an uneven surface and imbalance in wheel dynamic balance, leading to shaking while driving.